According with datasheet table 12.1 the instance ID 24 is used
for gmac generic clock.
This change adds the gmac_gclk entry in SAM9X7 clock description
table.

Signed-off-by: Mihai Sain <mihai.sain@microchip.com>
---
 drivers/clk/at91/sam9x7.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/clk/at91/sam9x7.c b/drivers/clk/at91/sam9x7.c
index 68e569bd70f5..8b52da194849 100644
--- a/drivers/clk/at91/sam9x7.c
+++ b/drivers/clk/at91/sam9x7.c
@@ -568,6 +568,15 @@ static const struct {
 		.pp_chg_id = INT_MIN,
 	},
 
+	{
+		.n = "gmac_gclk",
+		.id = 24,
+		.pp = { "audiopll_divpmcck", "plla_div2pmcck", },
+		.pp_mux_table = { 6, 8, },
+		.pp_count = 2,
+		.pp_chg_id = INT_MIN,
+	},
+
 	{
 		.n = "lcd_gclk",
 		.id = 25,
-- 
2.52.0